The Role of super() in Python

In Python, the super() function is primarily used to call methods from a parent or superclass. This is notably useful in scenarios involving inheritance,especially multiple inheritance,where a class inherits from multiple parent classes. The super() function ensures that methods from all parent classes are properly invoked, following a defined method resolution order (MRO) [[1]].

Consider a scenario with multiple inheritance. When a class inherits from two parent classes, say First and Second, the MRO determines the order in which methods are searched. When super() is called within a method of the child class, it searches the MRO for the next class in line and invokes the corresponding method. This ensures that initialization and other crucial operations are performed in the correct order [[1]].

“Now call to super in init defined in First will continue searching MRO and find init defined in Second, and any call to super will hit the default object init.” [[1]]

The role of super() in Java

In Java,super() is used to call the constructor of the superclass from a subclass. When a subclass is instantiated, it’s essential to ensure that the superclass is properly initialized. If you don’t explicitly call a superclass constructor, Java automatically calls the no-argument constructor of the superclass [[2]].

However, the real power of super() in Java comes into play when the superclass constructor requires arguments. In such cases, you must explicitly call the superclass constructor using super(arguments), passing the necessary parameters from the subclass. This ensures that the superclass is initialized with the correct values [[2]].